Chair with adjustable seat.



J. A. WILKINSON. CHAIR WITH ADJUSTABLE' SEAT. APPLIOATION FILED H1B. 4,1905.

l* v Paehted Mar. 23,- 1909.

WITNESS-s;

UNITED sTATEs P ETENT OEEIOE.

JOHN ALLAN WILKINSON, OF NEW YORK, N. Y., `ASSIGrNOR OF lHREE-FOURTHS TOJOHN PENNIE AND ONE-FOURTH TO ALBERT WANNER, JR., AND EDWIN P. WANNER,OF NEW "YORK, N. Y.

.CHAIR WITH ADJUSTABLE SEAT.

Specification of Letters Patent Patented March 2.3, 1909.

Application filed February 4, 1905. Serial No. 244,157.

To all whom it may concern:

Be it known that I, JOHN A. WILKINSON, a citizen of the Dominion ofCanada, residing in the city of New York, State and county of New York,have invented -certain new and useful Improvements in Chairs withAdjustable Seats; and I do hereby declare the Yfollowing to be a full,clear, and exactA descri Ytion of the invention, such asfwill enab eothers skilled in the art to which it apperu tains to make and use thesame.

This invention relates to certain new and useful improvements in chairsprovided with an adjustable seat.

My improved hair can either be firmly se-A cured to the lloor or carriedby a portable supportingstand, and has, as its'main characteristicfeature that the seat carrier and the support holding the latter arecomposed of two tubes vertically adjustable one within the other, theseat carrier tube being so are ranged as to freely revolve within thetubularsupport andits adjustment being eli'ected by the like adjustmentof a bearing block arranged within the tubular support and upon whichthe seat carrier rests, o'r by the l adjustment of the tubular su )portwithin the portable stand, when the atter is em'- ployed.

rThe accompanying drawing represents a side elevation arti 1n sectlon'of a chanconstructed in accordance with the present invention and shownas fastened to the floor.

The chair is provided with a tubular supporti?) which 1s inserted withina socketshaped foot or stand a secured to the loor. A second tube dwhich forms the scat carrier is inserted within the tube b and can bcand consequently the adjustment of the seat toa higher or lower level iseffected by dislar support b and the latter is removed,

whereupon theblock c (which can be displaced within the tube b) is.pushed upward within the latter until one ofthe lower holes of the blockis opposite..the aperture in the tube b. The tube b is thereu onreinserted within the stand a and thepi'illing secured in its positionby screwing in the screw g, whereby the tube b will also bepreventedfrom rotating. The seat carrier may now be'inserted again, andthe seat will be raised to the desired height.

y Instead of inserting the tubular sup ort b y' in a footrigidlyysecured to the floor, t e arrangement may be such that thetubular support b is inserted in a portable foot or stand so Aas .to fitit tightly and to be vertically adjustable withinv the same.

rier or the woo en filling of the seat carrier, which is inserted in thesupporting tube and upon which the seat carrier freely revolves, is inthe modified arrangement rigidi fastened within the tubular support andt e ad' block is The wooden filling u on which rests the seat car- Yjustrncnt of the scat in the direction of its' height is elected bydisplacing and then 95 clamping the tubular support i1ra cla1np1ngsocket or a clamping ring provided with a y' screw and which can, ifdesired, be fastened to the portable stand. 4

In both forms of construction, the hollow `100 tube of the seat carriermay be replaced by a ad'usted vertically within the same. 'lhe tu ularsu port l) contains a wooden bearing g block or I'iilmg c which can beadjusted in a vertical direction, and the seat carrier al is i lreferably provided throughout its entire ength with a flllingf of wood.'lt [its the 45 tube b exactly, enters into the same for a suitabledistance and rests upon the bearing block c. so that the seat can freelyrotate solid rod. within the support b. 'l`o facilitate the rol vl'lavingthus described my mvention,.what .tation of the seat, thebearing block c is pro- .l claim 1s: y

vided on its upper surface with a pro'ection, l. A chan', provided witha seat, a rotata- 105 .(for instance, a nail with a spherica head)l blevertically adjustable seat carrier, anda so that the seat carrier d orrather its wooden tubular support for seat carrier, said Iilling f restsupon the smallest possible fric- I tubular su )port contamlng a bearinglblock tional surface. upon w-hic 1 the seat carrier can turn treely,

55 The vertical adjustment of the seat carrier 1 said bearmg block beingadjustable to dit- '1 10 feront heights within the tubular support; uponwhich the seat carrier can tu substantially as described, seid bearingblock being adjustab 2. A chair, provided with a seat, a rotatablevertically 'adjustable seat carrier consist- I means of a screw ing of atube having a Wood filling, and a tupassing through bular sup ortcontaining a bearing block adi into the block; substantially as desjustable t erein and provided with a rounded In testimony whereof Iallix projection or stud upon which the Wood in presence of twowitnesses.

hlling rests; substantially as described.

3. A chair, provided with a seat, a rotatal ble vertically adjustableseat carrier, and a tubular support for said seat carrier, said tubularsupport containing a bearing block Vitnesses JOHN C. PENNIE, XV. BEALLEWILLIAMS.

rn freely,

le to ldif- 17,' I ferent heights Within the tubular support by an apereture in the wall of the tubular support and cribed.

niy signature, 20

JOHN ALLAN WILKiNsoN.v

